唇侧牙槽嵴顶的位置及高度是保证前牙种植美学效果的关键因素。牙齿拔除后，唇侧骨板，尤其牙槽嵴顶区2 ~ 3 mm处首先发生吸收，继而引发牙槽骨三维方向的变化，软组织塌陷，成为美学修复难点。常规拔牙即刻种植技术的主要问题也是修复后常见的唇侧龈缘退缩，影响最终美学修复效果。牙片屏障即刻种植术是近年来逐渐开展起来的一项新的即刻种植技术，但是关于此项新技术还有一些问题值得探讨，如此技术的理论基础、适应证的把握、外科技术的要点（唇侧牙片的大小、形态、种植体的选择等）、长期美学效果及并发症的处理。本文就此作一综述。

In Implant Dentistry, the buccal alveolar ridge contour in the esthetic area has been confirmed as one of the key elements to obtain a high esthetic outcome. However, tooth extraction is always followed by the resorption of labial alveolar bone, especially in the most coronal 2 ~ 3 mm area, which can then cause dimensional changes in the remnant alveolar bone and severe gingival margin recession damaging the pink aesthetic outcome of peri-implant tissue. Therefore, immediate implant placement has been a significant challenging treatment modality for the clinician. The recently popularized socket shield technique involves intentional retention of a section of the remnant root at the time of immediate implant placement, thereby preserving the buccal bone from resorption. The objective of this systematic review was to assess the literature available on the socket shield technique and summarize its theoretical basis, indications and surgical essentials, as well as the long-term clinical outcomes and management of complications.